AutoCodes – Toyota – P1656 2001 Toyota Echo

P1656 2001 Toyota Echo Code - Oil Control Valve Circuit Malfunction

Quick Answer

Variable Valve Timing (VVT) system controls the intake valve timing to proper timing in response to driving condition. Common causes include Faulty Oil Control Valve (OCV), Oil Control Valve (OCV) harness is open or shorted, Oil Control Valve (OCV) circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1656 2001 Toyota Echo indicates Oil Control Valve Circuit Malfunction.
Common causes: Common causes include Faulty Oil Control Valve (OCV), Oil Control Valve (OCV) harness is open or shorted, Oil Control Valve (OCV) circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 15,046

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 06, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1656 2001 Toyota Echo Description

Variable Valve Timing (VVT) system controls the intake valve timing to proper timing in response to driving condition. The Engine Control Module (ECM) controls Oil Control Valve (OCV) to make the intake valve timing properly, and, oil pressure controlled with OCV is supplied to the VVT controller, and then, VVT controller changes relative position between the camshaft and the crankshaft.

OBDII Code P1656 2001 Toyota Echo - Oil Control Valve Circuit Malfunction - AutoCodes.com — P1656 2001 Toyota Echo Code - Oil Control Valve Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1656 2001 Toyota Echo?

Faulty Oil Control Valve (OCV)
Oil Control Valve (OCV) harness is open or shorted
Oil Control Valve (OCV) circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1656 2001 Toyota Echo?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1656 2001 Toyota Echo code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1656 2001 Toyota Echo code?

Need more information on how to fix the P1656 2001 Toyota Echo code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1656 2001 Toyota Echo Code

1. What does the OBDII code P1656 on a 2001 Toyota Echo indicate?

The code P1656 indicates an Oil Control Valve Circuit Malfunction in the vehicle's engine.

2. What are the common symptoms of the P1656 code in a 2001 Toyota Echo?

Common symptoms include rough idling, engine misfires, decreased fuel efficiency, and the Check Engine light being illuminated on the dashboard.

3. What are possible causes of the P1656 code in a 2001 Toyota Echo?

Possible causes include a faulty oil control valve, wiring or connector issues, low engine oil levels, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose the P1656 code in my 2001 Toyota Echo?

Diagnosing the P1656 code typically involves using an OBDII scanner to retrieve the code, inspecting the oil control valve and its wiring, checking engine oil levels, and testing the ECM for proper operation.

5. Can I continue driving my 2001 Toyota Echo with the P1656 code?

It is not recommended to continue driving your vehicle with the P1656 code present, as it can lead to potential engine damage or performance issues if left unaddressed.

6. How can I repair the Oil Control Valve Circuit Malfunction in my 2001 Toyota Echo?

Repairing the issue may involve replacing the oil control valve, repairing or replacing damaged wiring or connectors, ensuring proper engine oil levels, and resetting the ECM after the repairs are completed.

7. Will resetting the Check Engine light resolve the P1656 code in my 2001 Toyota Echo?

Simply resetting the Check Engine light will not solve the underlying issue causing the P1656 code. Proper diagnosis and repairs are necessary to address the Oil Control Valve Circuit Malfunction.

8. How much does it cost to fix the P1656 code in a 2001 Toyota Echo?

The cost of fixing the P1656 code can vary depending on the specific cause of the issue, but it may involve parts and labor costs for replacing the oil control valve, repairing wiring, or addressing other related components.

9. Can a DIY enthusiast fix the P1656 code in a 2001 Toyota Echo?

While some DIY enthusiasts may have the skills to address the P1656 code, it is recommended to have a professional mechanic diagnose and repair the issue to ensure proper resolution and prevent further damage to the vehicle.

10. How often does the P1656 code occur in a 2001 Toyota Echo?

The occurrence of the P1656 code can vary depending on the vehicle's maintenance history, driving conditions, and other factors. If the code appears, it should be addressed promptly to avoid potential engine issues.